What is table spool lazy spool?
Lazy Spool only reads data when single rows are required and creates a table for the near future and then creates that table in a “lazy” way. That is, they only read and store rows in the temporary table when that particular parent statement actually requests a trusted row. …
What is table spool eager spool?
The role of the Eager Spool is to identify all rows received by other operators and store those rows found in the TempDB database. The word “impatient” means that the operator will read ALL series of the previous operator at time i.
What’s the difference between eager spool and lazy spool?
Going back to what I covered in the Eager the Spool explanation, Lazy Spool is your non-blocking statement and Eager Spool is your blocking statement. To highlight the precise lazy coil, let’s create a table called Pedidos (meaning “orders” in Portuguese). The following script generates a table and fills the house with unnecessary data:
When to use spool or spool off in SQL?
SQL> spool /tmp/myfile.lst After the actual spool is set, SQL*Plus continues to spool output until the SPOOL OFF command is issued. Note that the file cannot be used or viewed until the SPOOL OFF command is executed. The spool effect is very useful if you prefer to generate SQL from a dictionary of documents.
What is the difference between a single spool and two spool engine?
In a single-shaft engine, the high pressure from the wind turbine powers the entire compressor. In the fabulous bypass engine, the compressor and high-pressure turbine are divided into two separate segments. Each compressor segment is derived from its respective turbine using several separate drive shafts located one inside the other.
What is on the N2 spool of a triple spool engine?
In a three-circuit engine, N2 refers to the speed generated by the medium speed coil, which consists of a medium pressure compressor and a turbine.
Vijay is a tech writer with years of experience in the Windows world. He’s seen it all – from simple problems to catastrophic system failures. He loves nothing more than helping people fix their PCs, and he’s always happy to share his wisdom with anyone who needs it.
When Vijay isn’t fixing Windows problems, he likes to spend time with his wife and two young children. He also enjoys reading, playing cricket, and watching Bollywood movies.